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Boolean term conversion for null-tolerant disjunctive predicates
Boolean term conversion for null-tolerant disjunctive predicates
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机译:零容忍分离谓词的布尔项转换
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摘要
System, method, and computer program product to modify a received query, the received query including a first predicate specifying a comparison operator and a second predicate specifying an IS NULL operator, by replacing the comparison operator of the first predicate with an extended comparison operator, and removing the IS NULL operator from the received query, the extended comparison operator configured to support searching of NULL values in a database management system (DBMS), wherein the extended comparison operator is configured to return rows having column data matching a value predefined to represent NULL values.
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